Design and optimization of dimethyl ether steam reforming reactor
In order to improve the energy conversion efficiency of on-board dimethyl ether(DME)fuel cells,a numerical model of the DME reforming-to-hydrogen reaction system was developed and solved using COMSOL.The numerical results from the simulation and experiments were consistent.The structural optimization model was used to optimize the internal structure of the reformer reactor to obtain higher DME conversion and to analyse the effect of reaction conditions on DME conversion and hydrogen production.A simulation of the reforming to hydrogen industrial system was established to obtain the thermal efficiency of the reforming reactor with different structures under different operating conditions.The results showed that,through structural optimization,the DME steam reforming reaction system could achieve 91%DME conversion,89%hydrogen production and up to 75%system thermal efficiency for a single tube reactor.
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